Triplet with aspheric surfaces

Details Triplet with aspheric surfaces Triplet with aspheric surfaces

1976-06-03

1978-08-29

Clark, Conrad J.

350226, 350209, G02B 916, G02B 302

Patent

active

041099958

ABSTRACT:
A three element lens comprising two outer positive meniscuses and a central negative meniscus with all three elements concave to the aperture stop between the negative meniscus and a positive element.

REFERENCES:
patent: 2031792 (1936-02-01), Richter
patent: 2623434 (1952-12-01), Bechtold
patent: 3944337 (1976-03-01), Ruben

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